Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual Temporada Regular tem uma Liga de npsl e um Ano de 2008?
 ###Tabelas: CREATE TABLE regular_conflicts (regular_conflicts_id AUTO_INCREMENT PRIMARY KEY, Military deaths VARCHAR, Civilian deaths VARCHAR, Total deaths (not including foreigners) VARCHAR, Military and/or Civilian wounded VARCHAR, Total casualties VARCHAR) CREATE TABLE new_mexico_counties_ranked_by_per_capita_income (new_mexico_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE composition_of_the_20th_seanad (composition_of_the_20th_seanad_id AUTO_INCREMENT PRIMARY KEY, Administrative Panel INT, Agricultural Panel INT, Cultural and Educational Panel INT, Industrial and Commercial Panel INT, Labour Panel INT, National University of Ireland INT, University of Dublin INT, Nominated by the Taoiseach INT, Total INT) CREATE TABLE solo_songs (solo_songs_id AUTO_INCREMENT PRIMARY KEY, Title VARCHAR, Russian VARCHAR, Transliteration VARCHAR, Original Text VARCHAR, Start INT) CREATE TABLE year-by-year (year-by-year_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Division INT, League VARCHAR, Regular Season VARCHAR, Playoffs VARCHAR, Open Cup VARCHAR)  
SELECT Regular Season FROM year-by-year WHERE League = npsl AND Year = 2008